The Sure Check Fuel Light will assist in ensuring your safety every time you strain test your fuel prior to flight. At night, it's safe & easy to
use. The Sure Check Fuel Light, when used with your fuel test tube, will
light up all the water and debris that might be present.

The Sure Check Fuel Light case is made of durable aluminum, comes in a
variety of colors, weighs only 2.2 ounces, is 3" long, and uses a 12 volt battery to power a high intensity white LED light build. The casing is sealed with a strong neoprene rubber seal to keep any fuel from leaking into the case. Made in USA.

How do you use this Sure Check Fuel Light? Please explain process, what collection is necessary and then how is fuel illuminated.
The unit will come with instructions, but it is used with a screwdriver style fuel testers, not the bowl/cup type. Using your screwdriver type fuel tester, you would just unthread the plastic bezel holding the screwdriver bit in place, and remove the bit. The SureCheck fuel light will come with an o-ring, which is installed over the threads of the tester, then the light is threaded on to the tester. There is a button on the bottom of the unit to turn on the light. It is a momentary switch so will only light when the button is pressed. This is just used to help see the fuel in the test tube at night.